Roadway joint strip



June 30, 1936. w. Ff SCHULZ 2,046,297

ROADWAYl JOINT STRIP l Filed Aug. 1e, 1955 5 sheets-sheet 2 l A Fly' .4. y jg;

. fz l 2,1 1,9 y

June 3o, 1936. 'w F, SCHULZ 2,046,297

- Y JOINT STRIP I Filed Aug. 16, 3.933` 3 S eeee s-Sheet 3 czz Patented June 30, 1936 RoADwAY JOINT VSrimr Walter F. Schulz, Youngstown,` Ohio', assignor to Truscon Steel Company, Youngstown, Ohio, a corporation of Michigan Application August 16,

16 Claims.

The present invention relates to improvements on structures of the type covered by reissue patent to Bernard BriodyNo.'16,202 by opening one or more sides of the corrugations of lsuch patent as by slitting and expanding the material to attain the additional advantagesv` hereinafter set forth.

The product covered by said Briody-patent has come into extensivefcommercial userlfIt hasdo'eerr found to be desirable to employ for the same relatively heavy gauge metal, not'that such heavier metal is necessary for the desired formation of the joints in the concrete, but` to withstand danger of distortion during'transportation and placing of the material before pouring the concrete' and to provide greater resistance to displacement of position by the impact of theconcrete during pouring.

Further, the product covered by-said Briody patent is commonly punched transversely for insertion of the well-known dowel' bars" and vertically through the corrugations for the inser-v tion of the'well-known stake pins" where the structure is not held in position Yby devices other than such pins.

One object of -mypresent invention is to provide not only for the lines of fracture in the origi-Y nal body of the concrete and the interlocking effect between the nally adjacent: butseparated bodies of concrete as contemplated and achieved by the invention of YBriody,`but to increaseA the interlocking eifect laterally. By the presentv invention, the shear Value of the interlock'between such adjacent lbodies'oi concrete is greater than results from the use of the Briody'productbecause of the main supportingsurfacey andthe greater bearing area of the vsupporting surfaces for the same areavvof metal in the original blank and theflirregularity and diversicationfof interlocking surfaces resulting from the use of my invention.

Another object of my present invention is to further provide an interlock between the 'nally adjacent but separated Abodies'of concrete longi-l tudinally as well as vertically.

Still another object of my present invention is to provide a structure of said Briody vtype which will furnish the essential rigidity-'in metalof the same kind but also of lighter gauge and of less area in the blank from whichllformed` for a given depth 'of metaljointf'strip, thereby' reducing the raw 'material' costs, cost vof transportation based on weight, and labor expensein loadingfunloading and field installation.- Y

Thepreierred embodiment' of the present-1n- 1933, VSerial No. 685,480 f (Cl. 94-18 vennen andthe means by which the method of producing it is carried out, is shown in the ac-' companying drawingsvwherein: I

Figure 1 is a view in elevation of the road joint strip',

Figure 2 is a sectional view on vthe line 2--2 of Figure 1A but sho-wing one of the positioning pegs the dies and the initial deformation of the blank;v

Figure 6 is a-face View of the femalegdie member.

VFigure 7 is a sectional view on the line 'I-l of Figure 5. l

Figure 8 is a` detailed sectional View on the 8-8 o-f Figurer?.

Figure 9 is a horizontal sectional View through the 'nishingldie's and showing the same in separated relation and the product located between thesame. y

Figure 10 is a sectional view on the line 'Ill- III of Figure 9.

Figure v11 is aV detail view in elevation of the fin ished product. Y l Consideringfrst thefartcle` in its form,'it comprises outer or marginal strip sections' l2, and an intermediate strip section I3, the three strip sections being spaced apart and the intermediate section being offset and lying in a i line il completed 1 f plane 'preferably parallel to and therefore, at one side of the strip sections' I2. These strip sections I2, may be in a common plane. Uniting the intermediatesecti'orr-I13,iwith the sectionsaIZ, are rwebs of zigzag formation designated I4, and alternately unitedat spaced points with the opposite edges of theintermediate section I3, and inner edgesof lsingularity-"being other than a right angle, the i `webs, fbeingr, arranged in vtransversely convergent Irelationtoward. the intermediatesection I3. At intervals; the webs mayA have aligned portions oirsetl as shown at I5,`providing'vertical channelsV through which temporary stake pins as I6, may

Y'be driven to support the vstrip in position onithe -roadway base during the pouring of the concrete.V

ItV will also be clear that by reason of the relation of the webs'to the strips I2 and I3, horizontal spaces are provided in which dowel pins as I1,

` may be located. However, if desired, the inter- 4mediaterstrip maybe punched at intervals as shownat I8', for the reception of such pins.

The strip is placed on the subsurface of the roadway bed in the usual manner and as indicated in FigureY 2 and the concrete is then poured, leav-v ing the strip'V embedded thereinV as will be clear by l reference Yto Figure 3. Y

In the structure of the present invention,rcom pared with material Ycommonly used, it is possible` to attain in eighteen gauge metal approximately the same rigidity as would result from the Yuse o fVA similar Vsixteen 'gauge rnetalY in'previous` road strips of the BriodyV type and, on account of `reduction in the original .width of the necessary blank for'the final product of a joint stripof, for` instance, six and a` half inches inv height, and a Y saving in gauge betweenY sixteen and eighteen gauge metal, to save in raw material required,

aboutVthirty-two per cent thereof. `As between y other gauges and heights,a like ratable saving in material is secured. The structure of the present invention serves all the functions of Ythe structure of said Briody patent with the following, among other, additional advantages:

' In'producing the strip the webs are stretchedas hereinafter explainedfand in addition', the angu-V lar relation serves toV provide a wider strip with less material, thereby effecting a saving-in raw material and inv weight.

VVThe-plane surfaces of theportion I may-be Yamade toconform as nearly as may be desiredto correspond with the plane surfaces of the roadway and thereby produce a relatively stronger "mortised joint between adjacent sections ofV conicrete after the predeterminedcracking results.

The openings upon the respective sides of the( V webV portions permit the flow of concrete therethrough during the process of initial pouring andV thereby lessen resistance tovariationsv of pressure of fthe iiuid concrete upon one side or the other and a consequent tendency to displacement. While the lines of fracture ofthe concrete will follow the planes of weakness inthe concrete determined by the portions I2 and I3, and substan- 1 tially the lines between Vsections adjacent thereto V between the finally separatedjbodies of concrete as in Briody, the opposition of inclination of the faces :of l the concrete portionsY between the opposing inclinations Vof Vthe portions of'the webs IlI,j betweenV their connecting points will produce transverse interlocking of said por-V tions of concrete and act to prevent longitudifnal displacement between the two concrete sections lon opposite sides of the joint strip.VV And f there will be sufficient irregularityof the lines of fracture of the'concrete passing IthroughY the openingsto result in greater interlockingeffect both laterally and vertically without change in the otherwise effector the outline of the main interlocking joint between the adjacent bodies of concrete. Y By reason of the foregoing, the respectivevalue of the doweling projections is muchgreater than in structures Vof previous use vertically while producing a shear value against longitudinal displacement practically non-existent in prior struc- 'tures Y VDowel bars and stake pins as explained, may be :ranged end to Vend butslightlyspaoed apart as shown at 2|. `'I'hosecf adjacent rows are alter- `is entered'betweenQthedies 22,123,'onedie having Y 'arlongiturdinal rib 24, and the other, a longitudinal Vgroove 25, to receive thesame. These are of the' 3I, will press the intermediate section` I3,` between placed through the expanded openings withoutV special punching. Y H

The preferred method by which the strip isY produced will be clear by referring to Figures A flat elongatedV strip of sheet of metal as illustrated'in Figures-l and 4a, is provided with Vfour. Y

longitudinaljlines or rows of slits I9fand'20. The slits in each rowv are relatively short' and are arhated.V These `rows thus define Ythe marginal strip sections I2, thelintermediate strip section I3, and the blanksof the webs I4.` The slitted blank width'of the central strip section I3, and as willV be clear by a comparison of Figures 5 and 7, serve .when the diesjare rbrought'together, to offset the I2. vThe die V22, furthermore, irs-provided with. two hill andfvalley portions 26, Von opposite sides ofthe ribV 24,*thes'e interiitting with corresponding hill and Avalley portions 2'I, onthe die 23. ItV i will therefore belevident that kwhenfthe die is brought together and the intermediate strip section isoffset, the web blanks I4, will be caused to assume` a zigzag kforrnationrand in doing so, the material is longitudinally. stretched Vvand thusV made thinner. In other words, the surface length of each zigzag, web is then greater'than the surface length of the stripseotions I2 and I3. If de-VV sired, the die 22, may furthermore, be provided at vintervals with `punch studs 8adapted toV enter sockets 29., in thedie 23,-for the purpose of form-YV4 ing dowel'receiving'holesVV I 8. i

, The'result isranV intermediate form shown in Figures 55"?,Aa'nd 8, in which the offset relation `of the intermediate and marginal strip sections isV 'secured-and' a 4zigzag or vwavy formation of Athe V V webs isproduced. This initself,` would produce a 2o f `intermediatesection IY3,into. aplane at one side,` Y

of andparallel tothe plane of the strip sections A Y joint strip, but the surfaces of the zigzags are n 45 Vrecess 32, having apcentraljvertical surface35, lo-V 5 cated between inclinedsurfaces 36,'and the sideY `walls of therecess'being Valso preferably; inclined y outwardly; as shown at 3Iand at right angles toY the Surfaces 36. The die 3|, is providedswith an outstanding ribr38, yhaving a Vertical surface 39;

and convergentfside faces-40, set at right angles.V

to adjacentbackfaces 4I.; These,- inturn, terminate at verticalQfacesZ. Y

The material vinthe shape shown in Figures 5, Y'7, and 8, is placed between these dies.` 3i),Y and 3|, with the intermediateVV strip section I3, inV a positionrto be pressed against the facev 39, of the die When the diesare-brought together; therefore; it will Vbe-evidentthat the Vtrib-38,v of the die and to theoppositeside ofthe stripg'sections I2,

opposite side and into an angular relation to the =strips I2 and I3.Y Thi;stherefore,causesthe strip "sections I2, to be forcedapart a. greater distance 7 `and at the same timeswing the zigzag websto theYV and thus widens the structure without any addition to the material.

What I claim, is:

1. A roadway joint strip of metal comprising relatively offset metal strip sections, and an open lattice-like continuous web connecting adjacent offset marginal portions of such sections.

2. A roadway joint strip of metal comprising relatively oiset longitudinal metal strip sections, and a continuous longitudinal substantially zigzag web strip Section connected at intervals to the adjacent oifset marginal portions of the strip sections.

3. A roadway joint strip of metal comprising outer longitudinal strip sections, an intermediate longitudinal strip section offset from the outer sections, and longitudinally extending laterally offset lattice-like web sections connecting the marginal portions of the intermediate strip section with the adjacent portions of the outer strip sections.

4. A roadway joint strip of metal comprising outer strip sections, an intermediate strip section offset from the outer sections, continuous longitudinally extending and laterally oiset latticelike web sections connecting the outer edge por-l tions of the intermediate strip section with the inner adjacent edge portions of the outer strip sections.

5. A roadway joint strip of metal comprising outer longitudinal strip sections, an intermediate strip section oifset from the outer sections, and longitudinal continuous web sections of zigzag formation laterally disposed with respect to the intermediate and outer strips and having portions connected to the outer edge portions of the intermediate strip section and the inner adjacent edge portions of the outer strip sections.

6. A roadway joint strip of metal comprising longitudinally disposed strip sections that are relatively oifset, and a continuous longitudinally eX- tending web of substantially zigzag formation having portions along one edge connected to one edge of one of the strips and portions along its other edge connected to the adjacent edge of the other strip.

'7. A roadway joint strip of metal comprising longitudinally disposed strip sections that are relatively oset, and a web of substantially zigzag formation having portions along one edge integrally united to one edge of one of the strips and portions along its other edge integrally united to the adjacent edge of the other strip, the side faces oi the webs being angularly disposed with respect i to the side faces of the strip sections.

A roadway joint strip consisting of a single sheet of metal having outer strip sections located in substantially the same plane, an intermediate strip section oiset therefrom and substantially parallel thereto, and webs of expanded metal integral with the strip sections and connecting the same, said webs being disposed laterally to the strip sections and integrally joined thereto at spaced points, and having their side faces disposed in angular relation to the side faces of the strip section.

9. A roadway joint strip comprising longitudinal strip sections and a web connecting the same and consisting of a strand of longitudinally stretched material united at intervals to the strip sections.

10. A roadway joint strip comprising longitu- 5 dinal strip sections located in diierent planes, and a web of longitudinally stretched metal united alternately and at spaced points to the respective strip sections.

l1. A roadway joint strip comprising spaced longitudinal strip sections, ,and a web integrally connected at spaced points to the strip sections, of stretched material thinner than the material of the strip sections. f

l2. A roadway joint strip comprising spaced longitudinal strip sections, and a web integrally connected at spaced points to the strip sections,V of stretched material thinner than the material of the strip sections, said web being of zigzag formation and thereby having a surface length greater than the strip sections.

13. A roadway structure including adjacent slab sections having a longitudinal tongue and groove intertting engagement that prevents relative up .and down movement, said tongue and groove having transversely disposed zigzag interlocking portions in engagement that prevents relative longitudinal movement between the slabv sections.

14. A roadway joint strip comprising longitudinally disposed strip sections, one being laterally offset from the other, and a longitudinally extending intermediate strip of substantially zigzag formation bridging the space between adjacent edges of the said sections and having its side faces disposed in transverse angular relation to the side faces of the first strip sections, saidintermediate strip being joined at its bends alternately to the said adjacent edges of the first mentioned strips.

15. A roadway joint strip comprising longitudinally disposed substantially vertical upper and lower strip sections, one being laterally oifset from the other, the upper strip having its lower edge higher than the upper edge of the lower strip section, and a longitudinally extending substantially horizontal intermediate strip of substantially zigzag form bridging the space between the strip sections, the high points of one edge of the intermediate strip being joined to the lower edge of one of the rst strips, the bottom points of the 5o other'edge of the zigzag strip being joined to theV top edge of the other of the rst strips.

16. A roadway joint strip comprising spaced upper and lower longitudinal outer strip sections located in a substantially vertical plane, an intermediate strip section located in a substantially vertical plane at one side of the upper and lower strip sections, and continuous longitudinally disposed intermediate zigzag strip sections lying in angular relation to and bridging the spaces between the edges of the intermediate strip section and the upper and lower sections, the portions at the bends of said zigzag sections being joined to the adjacent edges of the upper, lower and intermediate strip sections. 35

WALTER F. SCHULZ. 

